<template>
  <div>
           <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮区 -->
         <el-row>
             <el-col>
                 <el-button type="primary">添加角色</el-button>
             </el-col>
         </el-row>


      <!-- 角色列表区域  -->
      <el-table :data="roleList" border stripe>
          <!-- 展开列 -->
          <el-table-column type="expand">
              <template  slot-scope="scope">
      
             <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id" :class="['dbbottom',i1 ===0 ? 'bdtop':'','vcenter']"> 
                 <!-- 渲染一级权限 -->
                 <el-col :span="5">
               <el-tag @close="removeRightById(scope.row,item1.id)" closable>
                    {{item1.authName}}  
               </el-tag>
               <i class="el-icon-caret-right">
               </i>
                 </el-col>
                 <!-- 渲染二级和三级权限 -->
                 <el-col :span="19">
                     <!-- 通过fot循环 嵌套渲染二级权限 -->
                     <el-row :class="[i2 ===0 ? '':'bdtop','vcenter']"  v-for="(item2,i2) in item1.children" :key="item2.id">
                     <el-col :span="6">
                         <el-tag type="success"  @close="removeRightById(scope.row,item2.id)" closable>{{item2.authName}}</el-tag>
                           <i class="el-icon-caret-right"></i>
                     </el-col>
                     <el-col :span="18">
                          <el-tag v-for="(item3,i3) in item2.children" :key="item3.id" type="warning" closable  @close="removeRightById(scope.row,item3.id)">
                          {{item3.authName}}
                          </el-tag>
                         </el-col>     
                     </el-row>
                 </el-col>
             </el-row>
              </template>
          </el-table-column>
          <!-- 索引列 -->
          <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                   <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                   <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                   <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVsible"
  width="50%"
  @close="setRightDialogClosed"
  >
  <!-- 树形控件   default-expand-al默认全部打开 -->
  <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer" >
    <el-button @click="setRightDialogVsible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights" >确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
 name:"Roles",
 data(){
     return{
        //所有角色列表数据
        roleList:[

        ],
        //控制分配权限对话框的显示与隐藏
        setRightDialogVsible:false,
        //所有权限的数据
        rightsList:[],
        //属性控件属性的绑定对象
        treeProps:{
            label:"authName",
            children:"children"
        },
        //默认选中的id数组
        defkeys:[],

        //当前即将分配权限的角色id
        roleId:""
     }
 },
 created(){
     this.getRolesLsit()
 },
 methods: {
     //获取所有角色的列表
    async getRolesLsit(){
   const{data:res} =   await this.$http.get("roles")
   if(res.meta.status !==200){
       return this.$message.error("获取角色列表失败")
   }
   this.roleList = res.data
   console.log(this.roleList)
     },
     //根据id删除对应的权限
     async removeRightById(role,rightId){
        //弹框用户是否删除
        const comFirmResult =  await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        if(comFirmResult !== 'confirm'){
            return this.$message.info("取消删除")
        }
      const {data:res}= await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status !==200){
          return this.$message.error("删除权限失败")
      }
      
    //   this.getRolesLsit()
     role.children = res.data
     },

     //展示分配权限的对话框
    async showSetRightDialog(role){
      this.roleId = role.id
  
    //获取所有权限的数据
  const  {data:res}=   await this.$http.get("rights/tree")
  if(res.meta.status !==200) {
      return this.$message.error("获取权限数据失败")
  }
  //获取到的权限数据保存到data中
   this.rightsList =res.data

//递归获取三级节点的id
this.getLeafKeys(role,this.defkeys)

   this.setRightDialogVsible =true
     },
      // 通过递归的形式获取角色下所有三级权限的id,并保存到defkeys数组中
     getLeafKeys(node,arr){
         //当前node节点不包含children属性,则是三级节点
      if(!node.children){
          return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item,arr)
      });
     },
     //监听分配权限对话框的关闭事件
     setRightDialogClosed(){
   this.defkeys=[]
     },
     //点击为角色分配权限
     async allotRights(){
         const keys = [
             ...this.$refs.treeRef.getCheckedKeys(),
             ...this.$refs.treeRef.getHalfCheckedKeys()
         ]
 const idStr = keys.join(",")
const {data:res} =   await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
if(res.meta.status!==200){
    return this.$message.error("分配权限失败")
}
 this.$message.success("分配权限成功")
 this.getRolesLsit()
 this.setRightDialogVsible=false
     }

 },
}
</script>

<style>
 .el-tag {
  margin: 7px;
 }
 .bdtop{
   border-top: 1px solid #eee;
 }
 .dbbottom{
   border-bottom: 1px solid #eee;
 }
 .vcenter{
     display: flex;
     align-items: center;
 }
</style>